.fileviewer_scroll__X5U3S{inline-size:100%;block-size:100%;overflow:auto;background:var(--surface-sunken);border-radius:var(--radius-control)}.fileviewer_centered___zcXl{display:flex;align-items:center;justify-content:center;min-block-size:100%;padding:var(--space-16);color:var(--text-muted);text-align:center}.fileviewer_pdfRoot__tnw4E{display:flex;flex-direction:column;inline-size:100%;block-size:100%;min-block-size:0;background:var(--surface-sunken);border-radius:var(--radius-control);overflow:hidden}.fileviewer_pdfToolbar__IBGUz{display:flex;align-items:center;gap:var(--space-12);padding:var(--space-6) var(--space-12);border-block-end:1px solid var(--border-default);background:var(--surface-hover)}.fileviewer_pdfToolBtn__23gXS{display:inline-flex;align-items:center;justify-content:center;min-inline-size:28px;block-size:28px;padding:0 var(--space-8);border:0;border-radius:var(--radius-control);background:transparent;color:var(--text-primary);font-size:16px;line-height:1;cursor:pointer}.fileviewer_pdfToolBtn__23gXS:hover,.fileviewer_pdfToolBtn__23gXS[aria-pressed=true]{background:var(--surface-hover)}.fileviewer_pdfPageInfo__QI4Qh{font-size:13px;color:var(--text-muted);font-variant-numeric:tabular-nums}.fileviewer_pdfZoom__p2VSh{display:flex;align-items:center;gap:var(--space-4);margin-inline-start:auto}.fileviewer_pdfZoomLabel__ts_aU{min-inline-size:44px;text-align:center;font-size:13px;color:var(--text-muted);font-variant-numeric:tabular-nums}.fileviewer_pdfBody__Ku5Zz{display:flex;flex:1 1 auto;min-block-size:0}.fileviewer_pdfThumbs__e9Tys{flex:0 0 auto;inline-size:168px;overflow-y:auto;padding:var(--space-12);display:flex;flex-direction:column;gap:var(--space-8);border-inline-end:1px solid var(--border-default);background:var(--surface-sunken)}.fileviewer_pdfThumbActive__bOjlc,.fileviewer_pdfThumb__Ztl_D{display:flex;flex-direction:column;align-items:center;gap:var(--space-4);padding:var(--space-6);border:1px solid transparent;border-radius:var(--radius-control);background:transparent;cursor:pointer}.fileviewer_pdfThumb__Ztl_D:hover{background:var(--surface-hover)}.fileviewer_pdfThumbActive__bOjlc{border-color:var(--accent-primary);background:var(--surface-hover)}.fileviewer_pdfThumbCanvas__DLiF0{inline-size:100%;block-size:auto;border-radius:4px;box-shadow:var(--shadow-1));background:var(--text-on-accent)}.fileviewer_pdfThumbNum__0QSEJ{font-size:11px;color:var(--text-muted);font-variant-numeric:tabular-nums}.fileviewer_pdfScroll__cGBT_{flex:1 1 auto;min-inline-size:0;overflow:auto;padding:var(--space-16)}.fileviewer_pdfPages__2jkOo{display:flex;flex-direction:column;align-items:center;gap:var(--space-16)}.fileviewer_pdfPageWrap__I_ikx{position:relative;border-radius:var(--radius-control);box-shadow:var(--shadow-2));background:var(--text-on-accent);overflow:hidden}.fileviewer_pdfCanvas__75X0H{display:block}.fileviewer_docx__G0R0_{display:flex;justify-content:center;padding:var(--space-12)}.fileviewer_docx__G0R0_ .docx-wrapper{background:transparent;padding:0}.fileviewer_docx__G0R0_ .docx{box-shadow:var(--shadow-2))}.fileviewer_sheetWrap__jRNHo{display:flex;flex-direction:column;block-size:100%;min-block-size:0}.fileviewer_sheetTabs__rcp9x{display:flex;gap:var(--space-4);padding:var(--space-8);overflow-x:auto;border-block-end:1px solid var(--border-default)}.fileviewer_sheetTabActive__haKYb,.fileviewer_sheetTab__DT6yD{padding:var(--space-4) var(--space-12);border:0;border-radius:var(--radius-control);background:transparent;color:var(--text-muted);font:inherit;cursor:pointer;white-space:nowrap}.fileviewer_sheetTabActive__haKYb{background:var(--surface-hover);color:var(--text-primary)}.fileviewer_sheetScroll__Lv0YB{flex:1 1 auto;min-block-size:0;overflow:auto;padding:var(--space-12)}.fileviewer_sheetTable__JUBMx{border-collapse:separate;border-spacing:0;font-size:13px;color:var(--text-primary);background:var(--surface-sunken);border-radius:var(--radius-control);overflow:hidden}.fileviewer_sheetTable__JUBMx td,.fileviewer_sheetTable__JUBMx th{border-inline-end:1px solid var(--border-subtle);border-block-end:1px solid var(--border-subtle)}.fileviewer_sheetCorner__e7lVf,.fileviewer_sheetHeadCell__gsEB7{position:sticky;top:0;z-index:2;background:var(--surface-hover);color:var(--text-primary);font-weight:600;text-align:start;padding:var(--space-8) var(--space-12);white-space:nowrap}.fileviewer_sheetRowNum__Umfqr{position:sticky;inset-inline-start:0;z-index:1;background:var(--surface-hover);color:var(--text-muted);font-weight:500;font-variant-numeric:tabular-nums;text-align:center;padding:var(--space-6) var(--space-12);min-inline-size:44px}.fileviewer_sheetCorner__e7lVf{inset-inline-start:0;z-index:3;min-inline-size:44px}.fileviewer_sheetCellNum__SlTAA,.fileviewer_sheetCell__nFVjz{padding:var(--space-6) var(--space-12);white-space:nowrap;max-inline-size:360px;overflow:hidden;text-overflow:ellipsis}.fileviewer_sheetCellNum__SlTAA{text-align:end;font-variant-numeric:tabular-nums}.fileviewer_sheetTable__JUBMx tbody tr:hover td,.fileviewer_sheetTable__JUBMx tbody tr:nth-child(2n) td{background:var(--surface-hover)}.fileviewer_sheetTruncated__B_pFl{padding:var(--space-8) var(--space-4);font-size:12px;color:var(--text-muted)}.fileviewer_text__SPhbG{margin:0;padding:var(--space-16);font-family:var(--font-mono);font-size:13px;line-height:1.55;color:var(--text-primary);white-space:pre-wrap;word-break:break-word}.fileviewer_imageWrap__cb5B1,.fileviewer_mediaWrap__nALOS{display:flex;align-items:center;justify-content:center;inline-size:100%;block-size:100%;padding:var(--space-16)}.fileviewer_image__M3_GF{-o-object-fit:contain;object-fit:contain}.fileviewer_image__M3_GF,.fileviewer_video__kYj4q{max-inline-size:100%;max-block-size:100%;border-radius:var(--radius-control)}.fileviewer_audio__3dAUa{inline-size:min(100%,480px)}.fileviewer_downloadCard__8r6YW{display:flex;flex-direction:column;align-items:center;gap:var(--space-8);margin:auto;padding:var(--space-24);color:var(--text-muted);text-align:center}.fileviewer_downloadName__dmxPc{color:var(--text-primary);font-weight:600;word-break:break-word}.fileviewer_downloadHint__h8LUJ{font-size:var(--text-caption)}.fileviewer_downloadBtn__DOm1j{margin-block-start:var(--space-8);padding:var(--space-8) var(--space-16);border-radius:var(--radius-control);background:var(--accent-primary);color:var(--text-on-accent);font-weight:600;text-decoration:none}.fileviewer_downloadBtn__DOm1j:hover{filter:brightness(1.08)}.sourceContentFileViewer_viewer__d0QdK{inline-size:min(92vw,1100px);block-size:min(90vh,1400px);max-inline-size:none;display:flex;flex-direction:column;gap:var(--space-12);padding:var(--space-16)}.sourceContentFileViewer_header__28ZOJ{display:flex;align-items:center;gap:var(--space-12)}.sourceContentFileViewer_title__rhJQH{flex:1 1 auto;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sourceContentFileViewer_actions__onyXy{display:flex;align-items:center;gap:var(--space-8);flex:0 0 auto}.sourceContentFileViewer_download__iuuUe{padding:var(--space-4) var(--space-12);border-radius:var(--radius-control);background:var(--surface-hover);color:var(--text-primary);font-size:14px;font-weight:600;text-decoration:none}.sourceContentFileViewer_download__iuuUe:hover{filter:brightness(1.12)}.sourceContentFileViewer_close__DlZKT{display:flex;align-items:center;justify-content:center;inline-size:32px;block-size:32px;border:0;border-radius:var(--radius-control);background:transparent;color:var(--text-muted);font-size:16px;line-height:1;cursor:pointer}.sourceContentFileViewer_close__DlZKT:hover{background:var(--surface-hover);color:var(--text-primary)}.sourceContentFileViewer_body__dmMEw{flex:1 1 auto;min-block-size:0;display:flex}.sourceContentFileViewer_center__2MVFP{flex:1 1 auto;display:flex;align-items:center;justify-content:center}.chat-input__controls .thryve-icon{inline-size:calc(var(--space-20) + var(--space-2));block-size:calc(var(--space-20) + var(--space-2))}.chat-input__controls .chat-input__spinner{inline-size:var(--space-20);block-size:var(--space-20)}.chat-input__send .chat-input__spinner,.chat-input__send .thryve-icon{inline-size:var(--space-16);block-size:var(--space-16)}.chat-input{--mode-color:var(--accent-primary)}.chat-input[data-mode=tutor]{--mode-color:var(--palette-purple)}.chat-input[data-mode=solve]{--mode-color:var(--palette-indigo)}.chat-input[data-mode=web_search]{--mode-color:var(--palette-teal)}.chat-input[data-mode=campus]{--mode-color:var(--palette-orange)}.chat-input__controls .chat-input__send:not(.chat-input__stop){background-color:var(--mode-color);color:var(--text-on-accent)}.chat-input__controls .chat-input__send:not(.chat-input__stop):active:not(:disabled),.chat-input__controls .chat-input__send:not(.chat-input__stop):hover:not(:disabled){background-color:color-mix(in srgb,var(--mode-color) 82%,var(--text-primary))}[data-brain-mode]{--mc-chat:var(--accent-primary);--mc-solve:var(--palette-indigo);--mc-web:var(--palette-teal);--mc-campus:var(--palette-orange);--mc:var(--mc-chat)}[data-brain-mode=solve]{--mc:var(--mc-solve)}[data-brain-mode=web]{--mc:var(--mc-web)}[data-brain-mode=campus]{--mc:var(--mc-campus)}.chat-input.bc{--bc-mc:var(--mc);--bc-no:var(--palette-red);--kit-ink-c:color-mix(in srgb,var(--bc-mc) 78%,var(--text-primary));gap:8px;padding-block:10px 8px;padding-inline:12px;border-radius:20px;border:1px solid var(--border-default);background:var(--surface-elevated);box-shadow:none;outline:var(--focus-ring-width) solid transparent;outline-offset:calc(-1 * var(--focus-ring-width));transition:border-color .25s,outline-color .14s ease,--kit-ink-c .2s ease}.chat-input.bc:focus-within,.chat-input.bc:hover{box-shadow:none}.chat-input.bc.is-voice{--kit-ink-c:color-mix(in srgb,var(--palette-rose) 82%,var(--text-primary))}.chat-input.bc:focus-within{--kit-ink-on:1;outline-color:var(--kit-ink-c);transition:border-color .25s,outline-color 0s,--kit-ink-c .2s ease}@media (prefers-reduced-motion:reduce){.chat-input.bc,.chat-input.bc:focus-within{transition:none}}.chat-input.bc.is-sending .chat-input__textarea{opacity:.45}.chat-input.bc .chat-input__controls .bc-send{--k-depth:2px;--k-base:color-mix(in srgb,var(--bc-mc) 55%,rgb(1 16 52));--k-glow-c:color-mix(in srgb,var(--bc-mc) 40%,transparent);--k-stand:0;position:relative;overflow:visible;background-color:color-mix(in srgb,var(--bc-mc) 28%,var(--surface-elevated));background-image:none;color:var(--text-on-accent);text-shadow:none;opacity:1;scale:.9;cursor:default;transition:--ky .42s cubic-bezier(.34,1.56,.64,1),--k-stand .22s ease,background-color .3s ease,scale .4s var(--ease-spring)}.chat-input.bc .chat-input__controls .bc-send:not(.is-ready):not(.is-stop){--ky:0px!important;--k-stand:0!important}.chat-input.bc .chat-input__controls .bc-send.is-ready{--k-stand:1;background-color:var(--bc-mc);background-image:linear-gradient(180deg,rgb(255 255 255/.22),transparent);scale:1;cursor:pointer}.chat-input.bc .chat-input__controls .bc-send.is-ready:hover:not(:disabled){background-color:var(--bc-mc)}.chat-input.bc .chat-input__controls .bc-send.is-down{transition:--ky 70ms cubic-bezier(.3,0,.6,1),--k-stand .22s ease,background-color .3s ease,scale .4s var(--ease-spring)}.chat-input.bc .chat-input__controls .bc-send .thryve-icon{transition:translate .35s var(--ease-spring)}.chat-input.bc .chat-input__controls .bc-send.is-ready:hover .thryve-icon{translate:0 -2px}.chat-input.bc .chat-input__controls .bc-send .thryve-icon.launch{animation:k-launch .5s cubic-bezier(.5,0,.3,1)}.chat-input.bc .chat-input__controls .bc-send.wake{animation:k-wake .5s var(--ease-spring)}@keyframes k-launch{0%{translate:0 -2px}45%{translate:0 -28px;opacity:0}46%{translate:0 18px;opacity:0}to{translate:0 0;opacity:1}}@keyframes k-wake{0%{scale:.9}50%{scale:1.08}to{scale:1}}.chat-input.bc .chat-input__controls .bc-send.is-stop{--k-base:color-mix(in srgb,var(--bc-no) 55%,rgb(1 16 52));background:var(--bc-no);scale:1;box-shadow:0 6px 16px color-mix(in srgb,var(--bc-no) 35%,transparent);animation:brain-pop-in .35s var(--ease-spring)}@media (prefers-reduced-motion:reduce){.chat-input.bc .chat-input__controls .bc-send,.chat-input.bc .chat-input__controls .bc-send .thryve-icon{transition:none!important;animation:none!important}}.bc-send__ring{position:absolute;inset:-4px;width:44px;height:44px;transform:rotate(-90deg);overflow:visible;pointer-events:none}.bc-send__ring circle{fill:none;stroke:var(--bc-no);stroke-width:2.5;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;animation:brain-draw 2.2s linear forwards}.chat-input.bc.is-voice .bc-mic button{background:var(--palette-rose);color:var(--text-on-accent);border-radius:999px;animation:brain-bump 1s ease-in-out infinite}.bc-ta{position:relative;display:flex;flex-direction:column}.bc-wave{position:absolute;inset:0;display:flex;pointer-events:none;background:var(--surface-elevated)}.bc-wave,.wave{align-items:center}.wave{display:inline-flex;gap:3px;height:22px;vertical-align:middle}.wave i{--i:0;width:3px;height:100%;border-radius:2px;background:var(--palette-rose);transform:scaleY(.25);animation:brain-wave-bar .8s ease-in-out infinite;animation-delay:calc(var(--i) * -73ms)}.wave i:nth-child(3n){animation-duration:.65s}.wave i:nth-child(4n){animation-duration:1s}.wave__l{margin-inline-start:8px;font-size:12.5px;color:var(--text-muted)}.bchip{--ink-raw:var(--accent-primary);flex:none;max-inline-size:280px;display:flex;gap:10px;align-items:center;padding-block:6px;padding-inline:6px 10px;border-radius:14px;background:var(--surface-sunken);border:1px solid var(--border-default);color:var(--ink-raw,var(--accent-primary))}.bchip.is-in{animation:brain-item-in .5s var(--ease-spring)}.bchip__art{position:relative;flex:none;display:grid}.bchip__art,.bchip__art .kind-art,.bchip__thumb{width:34px;height:34px}.bchip__thumb{border-radius:10px;-o-object-fit:cover;object-fit:cover}.bchip__fav{place-self:center;width:16px;height:16px;border-radius:4px;-o-object-fit:contain;object-fit:contain}.bchip__ring{position:absolute;inset:-3px;width:40px;height:40px;transform:rotate(-90deg);overflow:visible;transition:opacity .3s}.bchip__ring circle{fill:none;stroke:var(--accent-primary);stroke-width:2.5;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;animation:brain-draw 1.3s ease-in-out infinite}.bchip.is-done .bchip__ring{opacity:0}.bchip.is-done .bchip__ring circle{animation:none}.bchip__t{display:grid;min-width:0;flex:1}.bchip__t b{font-size:12.5px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bchip__open{all:unset;position:relative;overflow:hidden;display:block;min-width:0;cursor:pointer;border-radius:4px}.bchip__open:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}.bchip__open b{display:block}.bchip__open:hover b{text-decoration:underline}.bchip__s{font-size:11.5px;color:var(--text-muted)}.bchip.is-done .bchip__s{color:var(--qs-correct-text)}.bchip__x{display:grid;place-items:center;padding:2px;border:0;background:none;color:var(--text-muted);cursor:pointer;border-radius:999px}.bchip__x svg{width:14px;height:14px}.bchip__x:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:var(--focus-ring-offset)}.brain-slash-wrap{position:absolute;inset-block-end:100%;inset-inline:0;z-index:var(--z-toast);margin-block-end:var(--space-4)}.slash{--mc-local:var(--mc);position:relative;display:grid;padding:6px;border-radius:16px;border:1px solid var(--border-default);background:var(--surface-elevated);box-shadow:var(--shadow-3);max-block-size:320px;overflow-y:auto}.slash.is-in{animation:brain-menu-in .35s var(--ease-spring)}.slash__hl{position:absolute;inset-inline:6px;top:0;border-radius:11px;background:color-mix(in srgb,var(--mc-local) 10%,var(--surface-elevated));transition:transform var(--glide-dur) var(--glide-ease),height var(--glide-dur) var(--glide-ease)}.slash__r{--ink-raw:var(--accent-primary);position:relative;z-index:1;display:grid;grid-template-columns:30px auto minmax(0,1fr) auto;gap:10px;align-items:center;padding:5px 8px;border:0;background:none;border-radius:11px;color:var(--ink-raw,var(--accent-primary));cursor:pointer;text-align:start;font:inherit}.slash__r .kind-art{width:30px;height:30px}.slash__r b{font:600 12.5px var(--font-mono);color:var(--text-primary)}.slash__r span{font-size:12.5px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.slash__r:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:-2px}@keyframes brain-draw{to{stroke-dashoffset:0}}@keyframes brain-pop-in{0%{transform:scale(0);opacity:0}60%{transform:scale(1.18);opacity:1}to{transform:scale(1);opacity:1}}@keyframes brain-bump{0%,to{transform:scale(1)}40%{transform:scale(1.22)}70%{transform:scale(.94)}}@keyframes brain-item-in{0%{opacity:0;transform:translateY(-12px) scale(.96)}}@keyframes brain-wave-bar{0%,to{transform:scaleY(.2)}50%{transform:scaleY(1)}}@keyframes brain-menu-in{0%{opacity:0;transform:translateY(-6px) scale(.96)}}@media (prefers-reduced-motion:reduce){.chat-input.bc,.chat-input.bc *,.chat-input.bc :after,.chat-input.bc :before,.slash,.slash *{animation-duration:1ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:1ms!important;transition-delay:0s!important}}:where(.thryve-btn.bchip__open){all:revert;position:relative;overflow:hidden}.chat-input__uim-popover.uim-host__popover--menu{max-inline-size:min(30rem,92vw)}.chat-input__uim-popover.uim-host__popover--stempad{max-inline-size:min(34rem,94vw)}.thryve-popover.moves{inline-size:min(36rem,calc(100vw - var(--space-32)));max-block-size:min(48rem,85vh,var(--radix-popover-content-available-height,85vh));overflow-y:auto;padding:var(--space-16)}.moves__h{display:flex;align-items:center;gap:var(--space-8);margin-block-end:var(--space-12)}.moves__title{font-size:var(--text-body);font-weight:var(--font-weight-semibold);color:var(--text-primary)}.moves__hint{margin-inline-end:auto;font-size:var(--text-caption);color:var(--text-muted)}.moves__g{display:grid;gap:var(--space-20)}.moves__row{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));align-items:start;gap:var(--space-16) var(--space-20)}.moves__row+.moves__row{padding-block-start:var(--space-16);border-block-start:1px solid var(--border-default)}.moves__col{gap:var(--space-16)}.moves__col,.moves__sec{display:grid;align-content:start;min-inline-size:0}.moves__sec{gap:var(--space-8)}.moves__sh{margin:0;font-size:var(--text-micro);font-weight:var(--font-weight-semibold);letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.moves__items{display:flex;flex-wrap:wrap;gap:var(--space-6)}.moves__items--2col{display:grid;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr))}.moves__items--2col>.thryve-btn.moves__key{justify-content:flex-start}.thryve-btn.moves__key{--ink-raw:var(--accent-primary);--k-depth:2px;--k-base:color-mix(in srgb,var(--ink-raw,var(--accent-primary)) 26%,var(--border-default));gap:var(--space-6);max-inline-size:100%;padding-inline:var(--space-6) var(--space-12);border:1px solid var(--border-default);background:var(--surface-elevated);color:var(--text-primary);font-size:var(--text-caption);font-weight:var(--font-weight-medium)}.thryve-btn.moves__key:hover{background:color-mix(in srgb,var(--ink-raw,var(--accent-primary)) 8%,var(--surface-elevated))}.thryve-btn.moves__key--src{padding-inline:var(--space-8) var(--space-12)}.thryve-btn.moves__key--src .thryve-icon{color:var(--text-secondary)}.moves__art{display:inline-grid;flex:none}.moves__art .kind-art{inline-size:var(--space-20);block-size:var(--space-20)}.bstuck{--brain-no:var(--palette-red);--brain-ok:var(--qs-correct-border)}.bstuck .kbtn{position:relative;display:inline-flex;gap:8px;align-items:center;justify-content:center;border:1px solid var(--accent-primary);background:var(--accent-primary);color:var(--text-on-accent);border-radius:999px;padding:8px 16px;font:inherit;font-size:13px;font-weight:500;cursor:pointer;transition:background .2s,transform .25s var(--ease-spring),box-shadow .2s}.bstuck .kbtn--ghost{background:var(--surface-elevated);border-color:var(--border-default);color:var(--text-secondary)}.bstuck .kbtn{--k-depth:2px;--k-base:color-mix(in srgb,var(--accent-primary) 55%,rgb(1 16 52));--k-glow-c:color-mix(in srgb,var(--accent-primary) 30%,transparent)}.bstuck .kbtn--ghost{--k-base:color-mix(in srgb,var(--accent-primary) 18%,var(--border-default));--k-glow-c:transparent}.bstuck .kbtn--ghost:hover:not(:disabled){background:var(--surface-hover)}.bstuck .kbtn:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}.bstuck .kbtn svg{width:14px;height:14px}.bstuck .kbtn.is-ok{background:var(--qs-correct-border);border-color:var(--qs-correct-border);color:rgb(255 255 255)}.bstuck .kbtn:disabled{cursor:default}.bstuck .kbtn--ghost:disabled{opacity:.6}.bstuck.fx{position:relative;display:grid;gap:8px;justify-items:center;padding:16px 14px;border-radius:18px;border:1px solid var(--border-default);background:var(--surface-elevated);box-shadow:var(--shadow-1);text-align:center;color:var(--text-primary);margin-block:var(--space-8);margin-inline:var(--space-12);flex-shrink:0;animation:brain-rise .4s var(--ease-spring)}.bstuck .fx__title{font-size:15px;font-weight:700}.bstuck .fx__body{margin:0;font-size:12.5px;color:var(--text-secondary)}.bstuck .fx__btns{display:grid;gap:6px;inline-size:100%;margin-block-start:4px}.bstuck .fx__err{margin:0;font-size:12px;color:var(--qs-incorrect-text)}.bstuck .fx__art{display:grid;place-items:center;inline-size:100%;padding:2px 0 6px}.bstuck .sq{position:relative;inline-size:170px;block-size:100px;display:grid;gap:5px;align-content:center}.bstuck .sq i{--i:0;--w:60%;display:block;justify-self:start;inline-size:var(--w);block-size:8px;border-radius:4px;background:var(--surface-hover);transition:transform .6s cubic-bezier(.6,0,.3,1),opacity .4s;transition-delay:calc(var(--i) * 55ms)}.bstuck .sq i:nth-child(odd){justify-self:end;background:color-mix(in srgb,var(--accent-primary) 22%,var(--surface-elevated))}.bstuck .sq i:nth-child(7){animation:brain-overflow .9s ease-in-out infinite alternate}.bstuck .sq__sum{position:absolute;inset-inline-start:50%;inset-block-start:50%;display:inline-flex;gap:6px;align-items:center;white-space:nowrap;padding:6px 12px;border-radius:999px;background:var(--accent-primary);color:var(--text-on-accent);font-size:12px;font-weight:600;opacity:0;transform:translate(-50%,-50%) scale(.6);transition:opacity .3s .55s,transform .5s var(--ease-spring) .55s}[dir=rtl] .bstuck .sq__sum{transform:translate(50%,-50%) scale(.6)}.bstuck .sq__sum svg{width:14px;height:14px}.bstuck .sq.is-fold i{opacity:0;transform:translateY(calc((3 - var(--i)) * 13px)) scaleX(.2);animation:none}.bstuck .sq.is-fold .sq__sum{opacity:1;transform:translate(-50%,-50%) scale(1)}[dir=rtl] .bstuck .sq.is-fold .sq__sum{transform:translate(50%,-50%) scale(1)}.bstuck .fx__link{display:flex;align-items:center;gap:10px;padding:6px 0 4px}.bstuck .bk{--ink-raw:var(--accent-primary);display:inline-grid;flex:none;color:var(--ink-raw,var(--accent-primary))}.bstuck .bk--lg .kind-art{width:46px;height:46px}.bstuck .fx__dots{display:flex;gap:5px}.bstuck .fx__dots i{width:6px;height:6px;border-radius:50%;background:var(--border-default);transition:background .3s}.bstuck.fx--acc.is-link .fx__dots i{animation:brain-dots-flow .9s ease-in-out infinite}.bstuck.fx--acc.is-link .fx__dots i:nth-child(2){animation-delay:.12s}.bstuck.fx--acc.is-link .fx__dots i:nth-child(3){animation-delay:.24s}.bstuck.fx--acc.is-link .fx__dots i:nth-child(4){animation-delay:.36s}.bstuck.fx--acc.is-link .fx__dots i:nth-child(5){animation-delay:.48s}.bstuck.fx--acc.is-on .fx__dots i{animation:none;background:var(--qs-correct-border)}.bstuck .fx__me{display:grid}@keyframes brain-rise{0%{opacity:0;transform:translateY(12px)}}@keyframes brain-overflow{to{transform:translateY(5px);opacity:.5}}@keyframes brain-dots-flow{0%,to{background:var(--border-default);transform:none}50%{background:var(--accent-primary);transform:scale(1.5)}}@media (prefers-reduced-motion:reduce){.bstuck,.bstuck *,.bstuck :after,.bstuck :before{animation-duration:1ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:1ms!important;transition-delay:0s!important}}.context-meter__chip.cm[data-level]{--brain-no:var(--palette-red);gap:4px;min-block-size:0;block-size:auto;padding-block:3px;padding-inline:3px 7px;border-radius:999px;font-size:11px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--text-muted);transition:background .3s,color .3s}.context-meter__chip.cm[data-lvl=crit]{color:var(--qs-incorrect-text)}.context-meter__chip.cm--new.is-crit[data-level]{background:color-mix(in srgb,var(--brain-no) 10%,transparent);animation:brain-cm-crit 1.3s ease-in-out infinite}@keyframes brain-cm-crit{50%{box-shadow:0 0 0 4px color-mix(in srgb,var(--brain-no) 14%,transparent)}}.context-meter__ring{inline-size:20px;block-size:20px;flex-shrink:0}.context-meter__ring .cm__t{fill:none;stroke:var(--border-default);stroke-width:3}.context-meter__ring .cm__b{fill:none;stroke:var(--accent-primary);stroke-width:3;stroke-linecap:round;transition:stroke .3s}.cm[data-lvl=high] .cm__b{stroke:var(--palette-orange)}.cm[data-lvl=crit] .cm__b{stroke:var(--brain-no)}@media (prefers-reduced-motion:reduce){.context-meter__chip.cm--new.is-crit[data-level]{animation:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--brain-no) 14%,transparent)}.context-meter__chip.cm[data-level],.context-meter__ring .cm__b{transition-duration:1ms}}.context-meter__panel{inline-size:var(--size-panel-sm);display:flex;flex-direction:column;gap:var(--space-12)}.context-meter__head{display:flex;align-items:baseline;justify-content:space-between;gap:var(--space-8)}.context-meter__title{font-size:var(--text-caption);font-weight:var(--font-weight-semibold);color:var(--text-primary)}.context-meter__headline{font-size:var(--text-caption);font-variant-numeric:tabular-nums;color:var(--text-secondary)}.context-meter__headline[data-level=high]{color:var(--text-warning)}.context-meter__headline[data-level=critical]{color:var(--text-error)}.context-meter__totals{margin:0;font-size:var(--text-micro);font-variant-numeric:tabular-nums;color:var(--text-muted)}.context-meter__bar{display:flex;gap:var(--space-2);block-size:var(--space-8);border-radius:var(--radius-pill);background-color:var(--surface-sunken);overflow:hidden}.context-meter__segment{block-size:100%;min-inline-size:var(--space-2)}.context-meter__legend{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-6)}.context-meter__row{display:flex;align-items:center;gap:var(--space-8);font-size:var(--text-micro)}.context-meter__swatch{inline-size:var(--space-8);block-size:var(--space-8);flex-shrink:0;border-radius:var(--radius-pill)}.context-meter__name{flex:1;min-inline-size:0;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.context-meter__tokens{flex-shrink:0;font-variant-numeric:tabular-nums;color:var(--text-muted)}.context-meter__tokens[data-trimmed=true]{color:var(--text-warning)}.context-meter__segment[data-chart="1"],.context-meter__swatch[data-chart="1"]{background-color:var(--chart-1)}.context-meter__segment[data-chart="2"],.context-meter__swatch[data-chart="2"]{background-color:var(--chart-2)}.context-meter__segment[data-chart="3"],.context-meter__swatch[data-chart="3"]{background-color:var(--chart-3)}.context-meter__segment[data-chart="4"],.context-meter__swatch[data-chart="4"]{background-color:var(--chart-4)}.context-meter__segment[data-chart="5"],.context-meter__swatch[data-chart="5"]{background-color:var(--chart-5)}.context-meter__segment[data-chart="6"],.context-meter__swatch[data-chart="6"]{background-color:var(--chart-6)}.context-meter__foot{display:flex;justify-content:flex-end;padding-block-start:var(--space-8);border-block-start:1px solid var(--border-subtle)}.bplan{--bplan-mc:var(--accent-primary);--bplan-wait:var(--palette-orange);--bplan-on-wait:var(--text-on-accent);display:grid;gap:2px;padding:12px;border-radius:16px;border:1px solid var(--border-default);background:var(--surface-elevated);box-shadow:var(--shadow-1)}.bplan__h{display:flex;justify-content:space-between;margin:0 0 4px;font-size:11px;font-weight:400;letter-spacing:.07em;text-transform:uppercase;color:var(--text-muted)}.bplan__n{text-transform:none;letter-spacing:0;font-size:12px}.bplan__n b{color:var(--text-primary)}.bplan__steps{display:grid;gap:2px;margin:0;padding:0;list-style:none}.bplan__s{display:grid;grid-template-columns:22px minmax(0,1fr);gap:10px;align-items:center;padding:5px 0;font-size:13px;color:var(--text-secondary)}.bplan__m{position:relative;width:22px;height:22px;display:grid;place-items:center}.bplan__m svg{position:absolute;inset:0;width:22px;height:22px;overflow:visible}.bplan__ring{fill:none;stroke:var(--border-default);stroke-width:2;transform-box:fill-box;transform-origin:center;transition:fill .3s,stroke .3s}.bplan__chk{fill:none;stroke:var(--text-on-accent);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1;stroke-dashoffset:1}.bplan__s.is-done .bplan__ring{fill:var(--qs-correct-border);stroke:var(--qs-correct-border)}.bplan__s.is-done .bplan__chk{animation:bplan-draw .35s ease-out .1s forwards}.bplan__s.is-run .bplan__ring{stroke:var(--bplan-mc);stroke-width:2.5;stroke-dasharray:.28 .72;animation:bplan-spin .9s linear infinite}.bplan__s.is-run .bplan__t{color:var(--text-primary)}.bplan__wait{position:absolute;inset:0;border-radius:50%;display:grid;place-items:center;background:var(--bplan-wait);color:var(--bplan-on-wait);font:700 12px var(--font-sans);opacity:0;transform:scale(.5);transition:opacity .25s,transform .35s var(--ease-spring)}.bplan__s.is-wait .bplan__wait{opacity:1;transform:none;animation:bplan-wait-bounce 1.8s ease-in-out infinite}.bplan__s.is-wait .bplan__t{color:var(--text-primary);font-weight:500}.bplan__s.is-skip .bplan__t{text-decoration:line-through;color:var(--text-muted)}.bplan__s.is-skip .bplan__ring{stroke-dasharray:2 2.5}.bplan__s.is-fail .bplan__ring{stroke:var(--qs-incorrect-border)}.bplan__s.is-fail .bplan__t{color:var(--qs-incorrect-text)}.bplan__sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.bplan-ok{--bplan-wait:var(--palette-orange);--bplan-on-wait:var(--text-on-accent);display:grid;gap:10px;margin:6px 0 2px;padding:12px;border-radius:14px;background:color-mix(in srgb,var(--bplan-wait) 7%,var(--surface-elevated));border:1px solid color-mix(in srgb,var(--bplan-wait) 35%,var(--border-default));animation:bplan-rise .45s var(--ease-spring);transition:opacity .3s,transform .3s}.bplan-ok.is-out{opacity:0;transform:scale(.96)}.bplan-ok__h{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:0;font-size:13px;color:var(--text-primary)}.bplan-ok__badge{padding:2px 8px;border-radius:999px;background:var(--bplan-wait);color:var(--bplan-on-wait);font-size:10.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase}.bplan-ok__floor{margin:0;font-size:12px;color:var(--text-secondary)}.bplan-ok__stage{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:10px;align-items:center}.bplan-ok__items{display:grid;gap:4px;margin:0;padding:0;list-style:none;min-width:0}.bplan-ok__it{--fx:140px;--fy:0px;--i:0;display:flex;gap:6px;align-items:center;min-width:0;font-size:12px;color:var(--text-secondary);white-space:nowrap;transition:transform .7s cubic-bezier(.6,-.25,.4,1.15),opacity .5s}.bplan-ok__it .kind-art{width:22px;height:22px}.bplan-ok__it>span:last-child{overflow:hidden;text-overflow:ellipsis}.bplan-ok.is-go .bplan-ok__it{transform:translate(var(--fx),var(--fy)) scale(.25);opacity:0;transition-delay:calc(var(--i) * .12s)}.bplan-ok__arrow{display:inline-grid}.bplan-ok__arrow svg{width:16px;height:16px;color:var(--text-muted)}[dir=rtl] .bplan-ok__arrow svg{transform:scaleX(-1)}.bplan-ok__dest{display:grid;justify-items:center;gap:2px;max-width:96px;font-size:11px;color:var(--text-secondary);text-align:center}.bplan-ok__dest>span:last-child{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bplan-ok__bk{--ink-raw:var(--accent-primary);display:inline-grid;flex:none;color:var(--ink-raw,var(--accent-primary))}.bplan-ok__dest .bplan-ok__bk .kind-art{width:46px;height:46px}.bplan-ok__dest.is-gulp .bplan-ok__bk{animation:bplan-gulp .5s var(--ease-spring)}.bplan-ok__btns{display:flex;gap:6px}@keyframes bplan-draw{to{stroke-dashoffset:0}}@keyframes bplan-spin{to{transform:rotate(1turn)}}@keyframes bplan-wait-bounce{0%,70%,to{transform:none}80%{transform:translateY(-3px)}90%{transform:translateY(1px)}}@keyframes bplan-rise{0%{opacity:0;transform:translateY(12px)}}@keyframes bplan-gulp{0%{transform:scale(1)}35%{transform:scale(1.45)}65%{transform:scale(.9)}to{transform:scale(1)}}@media (prefers-reduced-motion:reduce){.bplan *,.bplan-ok,.bplan-ok *{animation:none!important;transition:none!important}.bplan__s.is-done .bplan__chk{stroke-dashoffset:0}.bplan-ok.is-go .bplan-ok__it{transform:none;opacity:1}}.solve-answer{display:flex;flex-direction:column;gap:var(--space-8);min-inline-size:0}.solve-answer__headline .rich-text{font-size:var(--text-title);font-weight:var(--font-weight-semibold);line-height:1.35;color:var(--text-primary)}.solve-answer__headline .rich-text__math{font-size:inherit}.solve-answer__explanation{color:var(--text-secondary);min-inline-size:0}.mrc{position:relative;display:grid;gap:9px;padding:12px;border-radius:16px;border:1px solid var(--border-default);background:var(--surface-elevated);box-shadow:var(--shadow-1);overflow:hidden;font-family:var(--font-sans)}.mrc.flash{animation:mrc-bump .4s var(--ease-spring)}@keyframes mrc-bump{0%,to{transform:scale(1)}40%{transform:scale(1.22)}70%{transform:scale(.94)}}.mrc__sr{position:absolute;inline-size:1px;block-size:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.mrc__h{display:flex;gap:10px;align-items:center;padding-bottom:9px;border-bottom:1px solid var(--border-default)}.mrc__art{--ink-raw:var(--accent-primary);display:inline-grid;flex:none;color:var(--ink-raw,var(--accent-primary))}.mrc__t{display:grid;flex:1;min-width:0}.mrc__t b{font-size:13px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mrc__t>span{font-size:11.5px;color:var(--text-muted)}.mrc .mrc__undo{padding:5px 12px;font-size:12px}.mrc__rows{display:grid;grid-template-columns:minmax(46px,max-content) auto 14px minmax(0,1fr);gap:9px 8px;margin:0;padding:0;list-style:none}.mrc__r{--i:0;grid-column:1/-1;display:grid;grid-template-columns:subgrid;align-items:center;font-size:12.5px}.mrc:not(.is-preview) .mrc__r:last-child{padding-inline-end:92px}.mrc__f{font-size:10.5px;letter-spacing:.06em;text-transform:uppercase}.mrc__f,.mrc__old{color:var(--text-muted);white-space:nowrap}.mrc__old{position:relative;justify-self:start;max-width:10em}.mrc__old>span{display:block;overflow:hidden;text-overflow:ellipsis}.mrc__old i{position:absolute;inset-inline:-2px;inset-block-start:52%;height:1.5px;border-radius:1px;background:var(--qs-incorrect-border);transform:scaleX(0);transform-origin:left}.mrc__arr{display:inline-flex}.mrc__arr svg{width:14px;height:14px;color:var(--text-muted)}.mrc__new{min-width:0}.mrc__new span{display:inline-block;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:middle;padding:1px 7px;border-radius:7px;background:color-mix(in srgb,var(--qs-correct-border) 16%,transparent);color:var(--text-primary);font-weight:500;font-variant-numeric:tabular-nums}.mrc.is-play .mrc__old i{animation:mrc-strike .35s ease-out forwards;animation-delay:calc(var(--i) * .3s + .2s)}.mrc.is-play .mrc__new span{animation:mrc-new-in .55s var(--ease-spring) backwards;animation-delay:calc(var(--i) * .3s + .45s)}@keyframes mrc-strike{to{transform:scaleX(1)}}@keyframes mrc-new-in{0%{opacity:0;transform:translateX(-10px);background:color-mix(in srgb,var(--qs-correct-border) 55%,transparent)}}.mrc:not(.is-play) .mrc__old i{transform:scaleX(1)}.mrc__stamp{position:absolute;inset-inline-end:12px;inset-block-end:10px;display:inline-flex;gap:4px;align-items:center;padding:2px 8px;border:2px solid;border-radius:8px;color:var(--qs-correct-text);font:700 11px var(--font-sans);letter-spacing:.08em;text-transform:uppercase;transform:rotate(-8deg)}.mrc__stamp svg{width:12px;height:12px}.mrc.is-play .mrc__stamp{animation:mrc-stamp-in .5s cubic-bezier(.3,.6,.3,1.3) 1.35s backwards}@keyframes mrc-stamp-in{0%{opacity:0;transform:rotate(-24deg) scale(1.9)}}.mrc.is-undone .mrc__old i{animation:none;transform:scaleX(0)}.mrc.is-undone .mrc__old{color:var(--text-primary);font-weight:500}.mrc.is-undone .mrc__new span{animation:none;opacity:.4;text-decoration:line-through;background:transparent}.mrc.is-undone .mrc__stamp{opacity:0}.mrc__empty,.mrc__err{margin:0;font-size:12px;color:var(--text-muted)}.mrc__err{color:var(--qs-incorrect-text)}.mrc__actions{display:flex;gap:8px}@media (prefers-reduced-motion:reduce){.mrc,.mrc *,.mrc :after,.mrc :before{animation-duration:1ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:1ms!important;transition-delay:0s!important}}.bsrc-pop{position:fixed;inset:0 auto auto 0;z-index:60;width:260px;max-width:calc(100vw - 16px);display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;padding:10px;border-radius:14px;background:var(--surface-elevated);border:1px solid var(--border-default);box-shadow:var(--shadow-3);pointer-events:none;color:var(--text-primary);font-family:var(--font-sans);text-align:start}.bsrc-pop.is-in{animation:bsrc-menu-in .3s var(--ease-spring)}@keyframes bsrc-menu-in{0%{opacity:0;transform:translateY(-6px) scale(.96)}}.bsrc-pop{--ink-raw:var(--accent-primary)}.bsrc-pop__art{display:grid;color:var(--ink-raw,var(--accent-primary))}.bsrc-pop__art .kind-art,.bsrc-pop__fav{width:40px;height:40px}.bsrc-pop__fav{display:grid;place-items:center;border-radius:12px;border:1px solid var(--border-default);background:var(--surface-sunken)}.bsrc-pop__fav img{width:20px;height:20px;border-radius:4px}.bsrc-pop__initial{font-size:16px;font-weight:600;color:var(--text-secondary)}.bsrc-pop__t{display:grid;gap:2px;min-width:0}.bsrc-pop__t b{font-size:12.5px;font-weight:600;overflow-wrap:anywhere}.bsrc-pop__t span{font-size:11.5px;line-height:1.4;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.bsrc-pop__k{grid-column:1/-1;font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--text-muted)}@media (prefers-reduced-motion:reduce){.bsrc-pop.is-in{animation:none}}.solve-page{display:flex;block-size:100%;overflow:hidden;font-family:var(--font-sans);color:var(--text-primary);background:var(--content-bg)}.solve-sidebar{display:flex;flex-direction:column}.solve-sidebar__section-head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-8);padding-block:var(--space-8);padding-inline:var(--space-12)}.solve-sidebar__section-label{font-size:var(--text-caption);font-weight:var(--font-weight-medium);color:var(--text-muted)}.solve-sidebar__filter-btn[data-active]{color:var(--accent-primary);background:color-mix(in srgb,var(--accent-primary) 12%,transparent)}.solve-sidebar__new-btn{gap:var(--space-6)}.solve-sidebar__list{flex:1 1 auto;overflow-y:auto;list-style:none;margin:0;padding:var(--space-8);display:flex;flex-direction:column;gap:var(--space-4)}.solve-sidebar__item{padding-block:var(--space-40);padding-inline:var(--space-12)}.solve-sidebar__item-card-count{font-size:var(--text-micro);color:var(--accent-primary);font-weight:var(--font-weight-medium)}.solve-sidebar__empty{display:flex;flex-direction:column;align-items:center;gap:var(--space-8);padding:var(--space-32) var(--space-16);text-align:center;font-size:var(--text-caption);color:var(--text-muted)}.solve-main{flex:1 1 auto;flex-direction:column;overflow:hidden}.solve-main,.solve-topbar{display:flex;position:relative}.solve-topbar{align-items:center;justify-content:center;gap:var(--space-12);padding-block:var(--space-16);padding-inline:var(--space-24);flex-shrink:0}.solve-topbar__tools{position:absolute;inset-inline-end:var(--space-16);inset-block-start:50%;transform:translateY(-50%)}.solve-main>.solve-topbar__tools--floating{inset-block-start:var(--space-12);transform:none;z-index:var(--z-raised)}.solve-tool-picker{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-12)}.solve-tool-picker .solve-tool-picker__btn{--tool-color:var(--accent-primary);display:inline-flex;align-items:center;justify-content:center;gap:var(--space-8);min-block-size:var(--space-48);padding-block:var(--space-12);padding-inline:var(--space-20);border-radius:var(--radius-pill);border:1px solid color-mix(in srgb,var(--tool-color) 28%,transparent);background-color:color-mix(in srgb,var(--tool-color) 14%,var(--surface-elevated));color:var(--tool-color);cursor:pointer;font-family:var(--font-sans);font-size:var(--text-body);font-weight:var(--font-weight-medium);line-height:1;box-shadow:var(--shadow-1);transition:background-color var(--duration-fast) var(--ease-default),color var(--duration-fast) var(--ease-default),border-color var(--duration-fast) var(--ease-default),box-shadow var(--duration-fast) var(--ease-default),transform var(--duration-fast) var(--ease-default)}.solve-tool-picker .solve-tool-picker__btn[data-tool=calculator]{--tool-color:var(--palette-indigo)}.solve-tool-picker .solve-tool-picker__btn[data-tool=converter]{--tool-color:var(--palette-teal)}.solve-tool-picker .solve-tool-picker__btn[data-tool=graphing]{--tool-color:var(--palette-purple)}.solve-tool-picker .solve-tool-picker__btn:hover:not(.solve-tool-picker__btn--selected){background-color:color-mix(in srgb,var(--tool-color) 22%,var(--surface-elevated));border-color:color-mix(in srgb,var(--tool-color) 45%,transparent);box-shadow:var(--shadow-2);transform:translateY(-1px)}.solve-tool-picker .solve-tool-picker__btn:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:var(--focus-ring-offset)}.solve-tool-picker .solve-tool-picker__btn--selected,.solve-tool-picker .solve-tool-picker__btn--selected:hover{background-color:var(--tool-color);border-color:var(--tool-color);color:var(--text-on-accent);box-shadow:var(--shadow-2),0 0 0 4px color-mix(in srgb,var(--tool-color) 24%,transparent),0 10px 28px color-mix(in srgb,var(--tool-color) 40%,transparent);transform:translateY(-2px)}@media (prefers-reduced-motion:reduce){.solve-tool-picker .solve-tool-picker__btn{transition:none}.solve-tool-picker .solve-tool-picker__btn--selected,.solve-tool-picker .solve-tool-picker__btn--selected:hover,.solve-tool-picker .solve-tool-picker__btn:hover:not(.solve-tool-picker__btn--selected){transform:none}}.solve-tabs{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-8) var(--space-16);border-block-end:1px solid var(--border-default);background:var(--content-bg);flex-shrink:0}.solve-content,.solve-tool-area{flex:1 1 auto;overflow:hidden;display:flex;flex-direction:column}.solve-content{min-block-size:0}.solve-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-12);flex:1 1 auto;padding:var(--space-48);text-align:center}.solve-state__title{margin:0;font-size:var(--text-title);font-weight:var(--font-weight-semibold)}.solve-state__body{margin:0;max-inline-size:36rem;font-size:var(--text-body);color:var(--text-secondary)}.solver__subject-glyph{color:var(--pill-color,currentColor)}.solver__subject-trigger[data-state=open] .chat-responder__chevron{transform:rotate(180deg)}.solve-sheet-paste{display:flex;flex-direction:column;gap:var(--space-12)}.solve-sheet-paste__label{font-size:var(--text-body);font-weight:var(--font-weight-medium);color:var(--text-primary)}.solve-sheet-paste__hint{font-size:var(--text-caption);color:var(--text-muted)}.solve-sheet-paste__confirm-banner{display:flex;align-items:center;gap:var(--space-8);padding:var(--space-12);border-radius:var(--radius-control);background:color-mix(in srgb,var(--accent-primary) 8%,transparent);border:1px solid var(--border-subtle);font-size:var(--text-caption);color:var(--text-primary)}.calc{display:flex;flex-direction:column;block-size:100%;overflow:hidden;max-inline-size:640px;margin-inline:auto;inline-size:100%}.calc__display{flex-shrink:0;padding:var(--space-16) var(--space-20);border-block-end:1px solid var(--border-subtle);background:var(--surface-elevated)}.calc__expression{font-size:var(--text-caption);color:var(--text-muted);min-block-size:1.4em}.calc__expression,.calc__result{text-align:end;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.calc__result{font-size:var(--text-display);font-weight:var(--font-weight-semibold);color:var(--text-primary);min-block-size:1.2em}.calc__history-strip{flex-shrink:0;max-block-size:72px;overflow-y:auto;padding:var(--space-4) var(--space-16);border-block-end:1px solid var(--border-default);display:flex;flex-direction:column;gap:var(--space-2)}.calc__history-entry{font-size:var(--text-micro);color:var(--text-muted);text-align:end;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.calc__keypad{flex:1 1 auto;overflow:hidden;display:grid;grid-template-columns:repeat(5,1fr);gap:var(--space-4);padding:var(--space-12)}.calc__key{border-radius:var(--radius-control);background-color:var(--content-bg);font-size:var(--text-caption);block-size:auto;min-block-size:48px;padding-inline:var(--space-4)}.calc__key:hover{background-color:var(--surface-elevated)}.calc__key:active{background-color:var(--border-default)}.calc__key--op{color:var(--accent-primary)}.calc__key--equals,.calc__key--op{font-weight:var(--font-weight-semibold)}.calc__key--equals{background:var(--accent-primary);color:var(--content-bg);border-color:var(--accent-primary)}.calc__key--equals:hover{background:var(--accent-primary-hover)}.calc__key--clear{color:var(--text-error);font-weight:var(--font-weight-semibold)}.calc__key--mem{color:var(--text-muted);font-size:var(--text-micro)}.calc__followup{flex-shrink:0;padding:var(--space-8) var(--space-12);border-block-start:1px solid var(--border-default);display:flex;gap:var(--space-8)}.calc__followup-input{flex:1 1 auto;background-color:var(--surface-elevated);font-size:var(--text-caption)}.converter{display:flex;flex-direction:column;block-size:100%;overflow:hidden;max-inline-size:640px;margin-inline:auto;inline-size:100%;padding:var(--space-24) var(--space-16);gap:var(--space-20)}.converter__category-row{display:flex;align-items:center;gap:var(--space-12)}.converter__category-label{font-size:var(--text-caption);color:var(--text-muted);white-space:nowrap}.converter__inputs{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:var(--space-12)}.converter__swap-btn{border:1px solid var(--border-default);background-color:var(--surface-elevated);color:var(--text-secondary)}.converter__field{display:flex;flex-direction:column;gap:var(--space-6)}.converter__value-input{background-color:var(--surface-elevated);font-size:var(--text-title);font-weight:var(--font-weight-semibold);padding-block:var(--space-12);padding-inline:var(--space-16);block-size:auto}.converter__recent{display:flex;flex-direction:column;gap:var(--space-8)}.converter__recent-label{font-size:var(--text-caption);font-weight:var(--font-weight-semibold);color:var(--text-muted);letter-spacing:.04em;text-transform:uppercase}.converter__recent-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-4)}.converter__recent-row{display:flex;align-items:center;gap:var(--space-8);font-size:var(--text-caption);color:var(--text-secondary);padding:var(--space-6) var(--space-8);border-radius:var(--radius-control)}.converter__followup{margin-block-start:auto;padding-block-start:var(--space-12);border-block-start:1px solid var(--border-default);display:flex;gap:var(--space-8)}.converter__followup-input{flex:1 1 auto;background-color:var(--surface-elevated);font-size:var(--text-caption)}.graphing{display:flex;flex-direction:column;block-size:100%;background:var(--content-bg)}.graphing,.graphing__workspace{min-block-size:0;overflow:hidden}.graphing__workspace{flex:1 1 auto;display:grid;grid-template-columns:minmax(16rem,20rem) 1fr}.graphing__rail{display:flex;flex-direction:column;gap:var(--space-8);padding:var(--space-12);border-inline-end:1px solid var(--border-default);overflow-y:auto;background:var(--content-bg);min-block-size:0}.graphing__rail-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-8)}.graphing__rail-header--sliders{margin-block-start:var(--space-12);padding-block-start:var(--space-12);border-block-start:1px solid var(--border-subtle)}.graphing__rail-title{margin:0;font-size:var(--text-caption);font-weight:var(--font-weight-medium);color:var(--text-secondary);letter-spacing:.02em;text-transform:uppercase}.graphing__rail-empty{margin:0;font-size:var(--text-caption);color:var(--text-muted);line-height:1.4}.graphing__eq-list,.graphing__slider-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-8)}.graphing__eq-card,.graphing__slider-card{display:flex;flex-direction:column;gap:var(--space-6);padding:var(--space-8);border-radius:var(--radius-control);border:1px solid var(--border-subtle);background:var(--surface-elevated)}.graphing__eq-card--active{border-color:color-mix(in srgb,var(--accent-primary) 45%,var(--border-subtle));box-shadow:0 0 0 1px color-mix(in srgb,var(--accent-primary) 18%,transparent)}.graphing__eq-card-top,.graphing__slider-card-top{display:flex;align-items:center;gap:var(--space-6)}.graphing__eq-card .graphing__eq-swatch{inline-size:var(--space-16);block-size:var(--space-16);min-inline-size:var(--space-16);min-block-size:var(--space-16);padding:0;border-radius:var(--radius-pill);border:2px solid color-mix(in srgb,var(--content-bg) 55%,transparent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--text-primary) 12%,transparent);flex-shrink:0}.graphing__eq-swatch[aria-pressed=false]{opacity:.35}.graphing__eq-index{flex:1 1 auto;font-size:var(--text-caption);color:var(--text-muted);font-variant-numeric:tabular-nums}.graphing__eq-input{font-size:var(--text-body);background:var(--content-bg);border:1px solid transparent;border-radius:var(--radius-control);min-block-size:var(--space-40);padding-block:var(--space-6);padding-inline:var(--space-12)}.graphing__eq-input:focus,.graphing__eq-input:focus-within{border-color:var(--accent-primary);outline:none}.graphing__eq-invalid{font-size:var(--text-micro);color:var(--text-warning)}.graphing__eq-card[data-invalid]{border-color:color-mix(in srgb,var(--text-warning) 35%,var(--border-subtle))}.graphing__slider-offers{display:flex;flex-wrap:wrap;gap:var(--space-6)}.graphing__slider-offer{font-variant-numeric:tabular-nums}.graphing__slider-label{flex:1 1 auto;font-size:var(--text-caption);font-weight:var(--font-weight-medium);color:var(--text-primary);font-variant-numeric:tabular-nums}.graphing__slider-range{inline-size:100%;accent-color:var(--accent-primary)}.graphing__canvas{position:relative;min-block-size:0;overflow:hidden;background:var(--surface-elevated)}.graphing__desmos-mount{position:absolute;inset:0;display:none}.graphing__desmos-mount[data-active]{display:block}.graphing__placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-12);block-size:100%;color:var(--text-muted);font-size:var(--text-body);padding:var(--space-32);text-align:center}.graphing__placeholder-title{font-size:var(--text-title);font-weight:var(--font-weight-semibold);color:var(--text-secondary)}.graphing__placeholder-error{margin:0;font-size:var(--text-caption);color:var(--text-secondary)}.graphing__placeholder-loading{margin:0;margin-block-start:var(--space-8);color:var(--text-muted)}.graphing__placeholder-note{font-size:var(--text-caption);color:var(--text-muted);max-inline-size:32rem}.graphing__ask-log{max-block-size:30%;overflow-y:auto;padding:var(--space-8) var(--space-16);gap:var(--space-6);border-block-start:1px solid var(--border-default);background:var(--content-bg)}.graphing__ask-log,.graphing__composer{flex-shrink:0;display:flex;flex-direction:column}.graphing__composer{gap:var(--space-8);inline-size:calc(100% - var(--space-48));max-inline-size:48rem;margin-inline:auto;margin-block:var(--space-12) var(--space-24);padding-block:var(--space-12);padding-inline:var(--space-16);background-color:var(--surface-elevated);border:1px solid transparent;border-radius:var(--radius-card);box-shadow:var(--shadow-1);transition:box-shadow .2s ease}.contrast .graphing__composer,.dark .graphing__composer{border-color:var(--border-subtle)}.graphing__composer:focus-within,.graphing__composer:hover{box-shadow:var(--shadow-2)}@media (prefers-reduced-motion:reduce){.graphing__composer{transition:none}}.graphing__composer-textarea{flex:1;background:none;border:none;resize:none;font-size:var(--text-body);line-height:1.5;color:var(--text-primary);min-block-size:1.75rem;max-block-size:8rem;outline:none;font-family:inherit;overflow-y:auto;padding:0;inline-size:100%}.graphing__composer-textarea:focus{outline:none;border:none}.graphing__composer-textarea::-moz-placeholder{color:var(--text-muted)}.graphing__composer-textarea::placeholder{color:var(--text-muted)}.graphing__composer-controls{display:flex;align-items:center;justify-content:space-between;gap:var(--space-8)}.graphing__composer-controls-start{display:flex;align-items:center;gap:var(--space-8);min-inline-size:0}.graphing__composer-controls-end{display:flex;align-items:center;gap:var(--space-8);margin-inline-start:auto;flex-shrink:0}.graphing__composer-send{flex-shrink:0;inline-size:2.25rem;block-size:2.25rem;padding:0;border-radius:var(--radius-pill);display:inline-flex;align-items:center;justify-content:center}.solve-skeleton-row{display:flex;flex-direction:column;gap:var(--space-4);padding:var(--space-40) var(--space-12);border-radius:var(--radius-control)}.photomath-picker__list{display:flex;flex-direction:column;gap:var(--space-8);margin-block:var(--space-12);max-block-size:60vh;overflow-y:auto}.photomath-picker__row{display:flex;align-items:flex-start;gap:var(--space-12);padding:var(--space-12);border:1px solid var(--border-default);border-radius:var(--radius-container);cursor:pointer}.photomath-picker__row:has([data-state=checked]){border-color:var(--accent-primary);background:var(--surface-info)}.photomath-picker__row-body{display:flex;flex-direction:column;gap:var(--space-4);min-inline-size:0}.photomath-picker__row-label{font-weight:var(--font-weight-semibold);font-size:var(--text-caption);color:var(--text-primary)}.photomath-picker__preview{font-size:var(--text-caption);color:var(--text-secondary);font-family:var(--font-mono)}.photomath-picker__preview--graph{display:flex;align-items:center;gap:var(--space-8);font-family:var(--font-sans)}.photomath-picker__sketch{inline-size:var(--space-48);block-size:var(--space-48);flex:0 0 auto}.photomath-picker__preview-caption{color:var(--text-secondary)}.solve-camera{display:flex;flex-direction:column;gap:var(--space-12);inline-size:100%}.solve-camera__viewport{position:relative;inline-size:100%;aspect-ratio:4/3;background:var(--surface-elevated);border-radius:var(--radius-container);overflow:hidden;display:flex;align-items:center;justify-content:center}.solve-camera__image,.solve-camera__video{max-inline-size:100%;max-block-size:100%;-o-object-fit:contain;object-fit:contain}.solve-camera__crop-box{position:absolute;border:1px solid var(--accent-primary);box-shadow:0 0 0 100vmax rgb(0 0 0/45%);touch-action:none}.solve-camera__crop-handle{position:absolute;inline-size:var(--space-20);block-size:var(--space-20);padding:0;border-radius:var(--radius-pill);background:var(--accent-primary);border:1px solid var(--surface-elevated);touch-action:none}.solve-camera__crop-handle:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:var(--focus-ring-offset)}.solve-camera__crop-handle--nw{inset-block-start:calc(var(--space-20) / -2);inset-inline-start:calc(var(--space-20) / -2);cursor:nwse-resize}.solve-camera__crop-handle--ne{inset-block-start:calc(var(--space-20) / -2);inset-inline-end:calc(var(--space-20) / -2);cursor:nesw-resize}.solve-camera__crop-handle--sw{inset-block-end:calc(var(--space-20) / -2);inset-inline-start:calc(var(--space-20) / -2);cursor:nesw-resize}.solve-camera__crop-handle--se{inset-block-end:calc(var(--space-20) / -2);inset-inline-end:calc(var(--space-20) / -2);cursor:nwse-resize}.solve-camera__crop-move{position:absolute;inset:0;padding:0;cursor:move;background:transparent;border:none}.solve-camera__crop-move:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:calc(var(--focus-ring-offset) * -1)}.solve-camera__actions{display:flex;justify-content:flex-end;gap:var(--space-8)}.solve-camera__hint{font-size:var(--text-caption);color:var(--text-muted);margin:0}@media (prefers-reduced-motion:reduce){.deck__active-card{transition:none}}@media (max-width:768px){.solve-sidebar{display:none}.graphing__workspace{grid-template-columns:1fr;grid-template-rows:minmax(11rem,32%) 1fr}.graphing__rail{border-inline-end:none;border-block-end:1px solid var(--border-default)}.graphing__composer{inline-size:calc(100% - var(--space-24));margin-block-end:var(--space-16)}}.solve-mode-switch{display:inline-flex;align-items:center;min-inline-size:0}